The boundary problem of finite element method in solving the sound vibration of cavities with "open mouth" has been studied.

本文讨论了开腔振动问题的有限元计算中边界条件的处理。

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The new study tested how fetuses in nearly 100 pregnant women responded to a specific stimulus, in this case, a "vibroacoustic stimulation, " which is a very low sound that makes a vibration.

新研究测试了近100个孕妇的胎儿对特殊刺激的反应，在这情况下，“声刺激”，一种有振波很低的声。

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It automatically switches off the sound and puts itself into vibration mode.

它会自动关闭声音，进入振动模式。

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A pickup is a device that captures the vibration of the metal guitar strings and changes them into electronic sound signals.

VOA: special.2009.09.27

The isolation cones placed strategically in a tripod pattern at the bottom corners of the sound system reduce the vibration frequencies and provide the most stable supporting structure regardless of the surface on which it rests.

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When sound waves enter the tube, the vibration of the droplets will cause the sensor to detect changes optically as the beam is disturbed, supposedly resulting in near-perfect vocal reproduction.

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First, however, scientists will have to demonstrate the technology on a larger structure, of course, and they'll explore the possibility of other energy sources, like heat, sound and vibration.

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